词典释义：
the action or fact of making a specified thing smaller or less in amount, degree, or size
缩减，降低
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talks on arms reduction 削减武器谈判
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[count noun]
there had been a reduction in the number of casualties .伤亡人数已经减少。
[count noun]the amount by which something is made smaller, less, or lower in price
（数量的）削减；（价格的）降低
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special reductions on knitwear .针织品特价。
the simplification of a subject or problem to a particular form in presentation or analysis
归纳，简化
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the reduction of classical genetics to molecular biology .将古典遗传学归结为分子生物学。
【数】 简化，缩减，约化；归约。
【生】 染色体减半。
[count noun]a thing that is made smaller or less in size or amount, in particular
规模（或数量）被减少之物，尤指：
an arrangement of an orchestral score for piano or for a smaller group of performers
简编曲（管弦乐改编的钢琴曲或小乐队演奏曲）。
a thick and concentrated liquid or sauce made by boiling
浓汤，浓汁。
a copy of a picture or photograph made on a smaller scale than the original
（照片，画）缩小版。
the action of remedying a dislocation or fracture by returning the affected part of the body to its normal position
脱臼（或断骨）复位。
【化】 还原；被还原。
【语音】 弱化
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the process of vowel reduction.
元音弱化。
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reductionn.缩减；降低；规模被减少之物；脱臼复位；还原；被还原；弱化；简化；归约
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productionn.生产；制造；出示；拿出；提供；制作；监制；产量；发生；采集
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predictionn.预言之事；预料之事；预报之事；预报；预言；预计；预料
"late Middle English （denoting the action of bringing back）： from Old French, or from Latin
